Apparatus and method for loading a cassette tape in a video equipment

• Main Author: CHOI; JOON H
• Format: Patent
• Language: English
• Published: 03.05.1994
• Edition: 5
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

An apparatus and a method for loading a cassette tape in a video equipment, in which driving of a DC motor can be controlled according to an amount of load which is applied to the DC motor when the cassette tape is loaded. The apparatus include a rotation speed signal detecting circuit for detecting a signal corresponding to a rotation speed of the DC motor, an amplifying circuit for amplifying the detected rotation speed signal from the rotation speed signal detecting circuit by a predetermined amplification degree, a limiting circuit for inputting an output signal from the amplifying circuit and passing only signal components between predetermined maximum and minimum values, a comparison circuit for comparing an output signal from the limiting circuit with a predetermined reference signal and outputting a logic signal in accordance with the compared result, a reference signal generating circuit for feeding the predetermined reference signal to the comparison circuit, a PWM signal generating circuit for outputting a PWM signal of a desired duty ratio in accordance with the logic signal from the comparison circuit, and a smoothing circuit for smoothing the PWM signal from the PWM signal generating circuit and outputting the smoothed signal as a drive signal to the DC motor.